Long-distance pumping apparatus.



G.'C. ROBERTS.

LONG DISTANCE PUMPING APPARATUS.

APPLICAHON HLED 0CT.2 3. 1915.

1 ,26 ,2950 Patented Apr. 2, 1918.

WITNESS 6 fliZEEN/Z'R. 0 0 e? BY 4' I ATTORNEYS.

GEORGE o. ROBER'lS, or sriuixrrrriaim; MAssAeHUsf 'rrs,

BARK-ER MeNrtAe'reRI-Ne G61VPANY,.0F WEST srmnermtt, MASSACHUSETTS; A

CORPORATION or 'MASSAGHUSETTS.

LoNmDIs'rANcE PUMPING APPARATUS.

Stecificati on of Letters Eatent.

Patented Apr. 2, 19 18.

Afifilidzitiph filed Octotr 25, 1915. Serial No. 57,734.

To allwhom it camera;

Be it known that I, GEORGE Roemt'ss, 2L citizen of the Uilitetl Staltesof 'thiei iczr, and residing in Sprifigfield; iIl' the county 5 ofHempdh tIid State of Massachusetts,

have invehted eeftzti'h heW end tfsefu'l' Initprovements inLohg-Distzthoe Phrhphfg paratus, of which the following is aspecifieatioh.

This inventioh relates to i fnprovelheltts in sri pplyepparetrts" formeasuring ptrni's air-1d partiouldrly relates to improyehierit de sighedto eheolr the surging o'f the li cl through the pump rljld, use result,to improve the :tceurecy of the latter.

Measuring pumps are 1103i Wellkn twin turd in common use to dfispeilse1'neas red quantities of liquids. @he" or the Widest fields ofeppl'iozttiolr of pruhpsot" this class is in the dispensing of oils,such as, gesor lehe and; the like aiidf measuring pumps have become anecessary part ofthe equipment of every garage, as Well as factories andmany other places. Ihe user of measuring pu ps is enabled to keep hisgasolerre supply at it safe distance, not only to Comply with lob-e1regulations, but elsoito permit convenient re plenishment of the supply,and, at the same time, have the convenience of; drawing oil at thedesired point. Qneof the most important requisites of the measuring pu pi s accuracy Where, as is now eolh oh, the measurements oi the pump erein determining the price for t1- 3 the liquid dispensed to e pump shouldregister the p r rnouht dispensed, and tll lS lShQltl d' hetrrle el-litttl' hOW fat-st or slow the p i operated is especially impertzihtromi the SeIIer s standpoint that the pinup does not overmeasure; v MHeretofore, some; di eulty 1 sheep; expe rielieed with lilejaistlliiigidispensing inasmuch as the to ll ainbuht. of liquid dislpehsed from;theehpplgf tft ik piuhp, as shown by tljie me 01.1 the; 1- ti hatsfell-en short of the amt) t oi. 1i nerd-1 freed iii the supply .tfilik.like tl lvclei has heelfl'r 5th i 1 1m ere i t 1 no mill Shrink ge' doe"ta is we greet e be tnseatfyeat ride a supply apparatus for a meesr 1 1av found by eXpe1-im'e1j1t,,tl'1a t here the seppr tank is located zitztpoint remote to the 'pilmp, i111 overniea surelhent f'r'eqrienjtljyodours, and this overmeesurelhent is, more over, ateeentueted rapidoperation of the tr'l'np, Fl rtherlnore ha ye determili'ed romexperiment that this orermeitshremerrt is caused by a stirging of theliquid throrfgllr the Vtlfyels the kes place at p h red by themomehtiu'n of the liquid. The inlet valve; of the pum does not close qutekly a'nd sharply at the proper time but is held openha appreoi'gibl'einter-tel by the force of the large qfu-entity of flowing li'qui c'lj.As aresult, an excess aniorlnt of the liquid surges pest the velve :mdcauses at larger (1111a ,ti'ty to be dfehyeredj than is registered onthe meter. Necessarily, since this error is due to the momentum, itvaries] directly as the mass and Velocity of the liquid or, in otherWords, as, the distance of the supply from the pump Etfld as therapidity of operapump which ta ti'bl l' thereof. Where the pump isreasonably close to thesupjglly, the error described is not appreciable,bug with more remote location oif'the supply, the error becomescolisiderable. Rapid operation of the pmnp. also eerlss an inc-redse inthe error over slow operetifon for the reasons outlined.

Ah object. of this invention is to, provide an improved supply apparatusfor. it mersurirtgprim-p which is particulart'ly designed to permitremote location of the supply ten-1c, yetto elimimte inaccuratemeasurement due to the morne rltrim of the liquid dispensed illld causedby the remote loezittohof: the supply.

Another Object of; theinvention is ie;-

, r0 prunp compjsihg g1, supply tank loeetecl 13$ mere from the prrmpand an auxiliary tank loeztted the pump me arranged to directly supplythe latter and a siphon eon;- ltectie between the supply end auxilia yt}; ks arranged to feedfthe latter, all at ged to preyerrt inaccuratemeasm'ement of the pump, 1 1701.11 surging. y

A JEurther ohjeet'otthe invention i-s to pifOVide, a supply eppe-mtt Htheeless r edar rmnge1neht cat he part er autom ti r e$ ab $hm m the.siehm hetv s eedthe supply and auxiliary tanks,

Fig; 2.

after the latter have been drained by the pump and the supply tank hasagain been filled.

Other objects will appear in the description to follow and in theannexed claims.

Referring to the drawings as illustrating one preferred manner in whichthe invention may be put to use Figure l is a sectional elevationshowing the improved supply apparatus; and

Fig. 2 is a sectional elevation of the cylinder of the commonly usedi'neasuring pump illustrative of the valve action therein.

June 4, 1907, No. 855,504. The single cylin der pump, such as indicatedin the drawing, however, is the more common type of pump than the doublecylinder pump shown by the patent.

The cylinders of pumps of the classdescribed are arranged to receive theliquid from the lower end thereof and have an in let valve 9 in the baseof the cylinder and an outlet valve k in the piston i, all as shown inBoth these valves are of the socalled clack type and are arranged toopen by suction and to be normally held to their seats by gravity. Onthe upward stroke of piston z, the valve 9 is lifted to its dotted lineposition by suction while the valve 72, is held to its seat by gravityand the weight of the liquid above the piston, which is beingdischargedfrom the pump. The cylinder 6 is filled by suction and causes a movement01 liquid throughout the length of the pipe from the supply tank.lnnnediately on the start of the down stroke of piston z, the valve 7Llifts to its dotted line position, and the valve 9 should immediatelyclose. However, this valve, in order to close, must first check theflowing mass of liquid in the supply pipes, and thus it will be seenthat the valve is subjected to the momentum of the liquid. This momentumwhen sufficiently great, as in the case of remote location of the supplytank or of rapid operation of the pump, holds the valve 9 open for anappreciable interval after its proper time of closure and allows theliquid to surge past into the cylinder and through the open valve it.Thus, a quantity greater than the volume of the pump cylinder isdelivered. As the meter 03 and discharge register 6 are mechanicallyactuated from the piston red, as shown in the rectly as the distance ofthe supply tank from the pump and as the speed of operation of thelatter.

To obviate this inaccuracy and at the same time permit the location ofthe supply tank at a remote point or at a point convenient for fillingas adjacent the curb, I provide the system shown in Fig. 1. '1 is a mainstorage and supply tank which is preferably located underground and maybe filled through a pipe 2. It may be desirable in many instances, asidefrom local regulations compelling a remote location, to have the tank 1ad acent the curb for convenient replenishment while the point where thepump is placed may be a considerable distance away.

To prevent error in the measurement of pump A, where such remotelocation is nec essary or desirable, I provide a small auxilcomparisonwith tank 1. The lower end of tank 3 should be located somewhat belowthat of tank 1 to permit siphon action, and it is also preferable thatthe tank 3 be air tight for reasons later to appear. 7 A pipe 5 connectsthe pump cylinder Z) and the tank' and this pipe, as well as pipe 1,extends downwardly to a point closely adjacent the bottom thereof. Thepipe 1 is similarly disposed in the tank 1 and, if desirable, may beprovided with suitable filters.

In operation, the pump A draws liquid from the auxiliary tank 3, and, asthe latter is closely adjacent the pump, the momentum of the liquid inpipe 5 is not great enough to interfere with the delivery ofaccuratemeas ured quantities from the pump, even though the latter is rapidlyoperated. The tank 3 is fed by the siphon pipe 4 whereby the levels inthe two tanks are kept equal and the momentum in pipe 4 is taken up bytank 3. The surging of the liquid due to the momentum in pipe 4 takesplace in the tank 3 so that the accuracy of the pump is not afiectedthereby. After the tanks 1 and 3 are drained, the tank 1 is replenishedthrough the fill pipe 2, and the preferable operation is to filluntilthe liquid stands at a level in the fill pipe 2 which is above thelevel of pipe 4, whereby the siphon to the tank 3 is automaticallyreestablished. It will thus be evident that, with the arrangement shown,all the advantages of a supply closely adjacent the pump are obtainedwithout having the supply so located. If, however, the siphon betweenthe tanks does not start automatically for any reason, such as insuificient filling of pipe 2, for example, the siphon may be positivelyreestablished by the pump A. The tank 3, as has been described, isairtight and therefore continued pumping will start the flow in the pipe4.

Thus, an improved supply apparatus has been provided for use withmeasuring pumps to eliminate surging therein and the consequentinaccuracy of measurement. 1t is recognized that modifications may bemade 2. A pumping apparatus, comprising, in

combination, a suitable measuring pump, a main supply tank at a distancefrom said pump, a relatively small tank located near the pump andarranged to directly supply the latter, connections between said smalltank and the pump and connections between the two tanks arranged to feedthe smaller from the largerby automatic siphon action, all constructedand arranged so that the momentum of the liquid from the main supplytank cannot act on the pump and cause the delivery of inaccuratelymeasured quantities.

8. An anti-surge device for a measuring pump, comprising, an air tighttank adapted to be interposed between a measuring pump and its supply ata point adjacent the pump, said tank having an inlet provided for airtight connection with the supply, and an outlet provided for air tightconnection with a measuring pump, said tank adapted to be automaticallyfilled from the supply by siphon action and arranged to permit automaticreestablishment of siphon action by pumping, all constructed andarranged so that the momentum of the liquid flowing from the supply isprevented from acting on the measuring pump to cause the delivery ofinaccurately measured quantities therefrom.

4:. The combination with a measuring pump, of a supply tank adapted tobe placed at a distance therefrom and an auxiliary tank of relativelysmall capacity arranged to directly feed the pump through a shortdistance, and a siphon between the supply and auxiliary tanks arrangedto feed the latter through a relatively long dis tance and adapted to beautomatically reestablished by filling of the supply tank, allconstructed and arranged so that the momen tum of the liquid flowingthrough the rela tively long distance is dissipated in the auxiliarytank and is prevented from acting on the pump to cause the delivery ofinaccurately measured quantities therefrom.

5. A pumping apparatus, comprising, in combination, a measuring pump, asupply tank therefor at a distance from the pump, an air tight tan adjaccnt the pump, aconnection between the latter and the second tank and asiphon connection between the two tanks, all constructed and arranged toprevent surging of the liquid through the pump and to permit theautomatic reestal'ilishment of the siphon between said tanks by fillingof the latter or by pumping.

GEORGE G. ROBERTS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

